Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 208-655-6 | CAS number: 537-01-9
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The test item had statistically significant inhibitory effects on the growth of Scenedesmus subspicatus after the test period of 72 h first at the loading rate of 50 mg/L. Thus, this loading rate was determined as the 72h-LOELR. The 72h-NOELR was determined to be the loading rate of 25 mg/L. By contrast, the 72h-EL50 was > 100 mg/L. However, a significant phosphate depletion was observed at the two highest tested concentrations, probably due to a complexation process with the test item. As a consequence, the reduction of growth here observed was probably caused by an indirect effect of phosphate lack, rather than a toxic effect of dicerium tricarbonate
Key value for chemical safety assessment
Additional information
An experimental study, scored as Klimisch 1 (Bätscher, 2007) is selected as a key study, showing no toxic effect on algae. Indeed, the inhibition of algal growth was presumably caused by a secondary effect, the complexation of the essential algal nutrient phosphate by the test item. A statistically significant decrease of the phosphate concentration was determined at the loading rates of 50 and 100 mg/L. Thus the growth inhibition determined at these loading rates may have been caused by depletion of phosphate in the test medium.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
